Sean Saint to sell 3,384 Beta Bionics shares (BBNX) via Morgan Stanley

Rhea-AI Filing Summary

Sean Saint reported a Form 144 sale notice relating to Common Stock of Beta Bionics, Inc. The filing lists 3,384 shares associated with restricted stock units vesting under a registered plan on 03/01/2026, with Morgan Stanley Smith Barney LLC named as broker on 03/02/2026.

The filing also shows prior sales of 3,278 shares on 12/02/2025 for $96,163.08. The securities are described as compensation for services rendered to the issuer.

Insights

Insider Transactions Analyst

Insider filed a routine sale notice for vested RSUs totaling 3,384 shares.

The filing lists 3,384 shares tied to restricted stock units vesting on 03/01/2026, and identifies Morgan Stanley Smith Barney LLC as the broker on 03/02/2026. This indicates the reporting person intends to effect sales through a broker after vesting.

Prior activity shows a sale of 3,278 shares on 12/02/2025 for $96,163.08. Timing and exact execution details for the new shares are not provided in the excerpt.

FAQ

What did the Form 144 for BBNX disclose?

The Form 144 discloses intent to sell 3,384 shares tied to restricted stock units vesting on 03/01/2026, with Morgan Stanley Smith Barney LLC listed as broker on 03/02/2026.

Who is the reporting person on the BBNX Form 144?

The reporting person is Sean Saint, listed c/o Beta Bionics, Inc., with the sale notice referencing compensation-related RSUs vesting under a registered plan on 03/01/2026.

How many shares were sold in the past three months per the filing?

The filing lists a prior sale of 3,278 shares on 12/02/2025 with an aggregate amount of $96,163.08 shown in the excerpt.

Which broker is named for the intended sale in the Form 144?

Morgan Stanley Smith Barney LLC is identified as the broker on the filing, with an address at 1 New York Plaza, New York, NY, and a broker date of 03/02/2026.

Are the shares being sold from compensation or open-market holdings?

The shares are tied to restricted stock units vesting under a registered plan, and the filing explicitly states the shares relate to compensation for services rendered to the issuer on 03/01/2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/04/2026 - 04:54 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002048593
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	BETA BIONICS, INC.
SEC File Number	001-42491
Address of Issuer	11 HUGHES IRVINE CALIFORNIA 92618
Phone	949-427-7785
Name of Person for Whose Account the Securities are To Be Sold	Sean Saint
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	Morgan Stanley Smith Barney LLC 1 New York Plaza New York NY 10004	3384	42367.68	44382146	03/02/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	03/01/2026	Restricted Stock Units vesting under registered plan	Issuer			3384	03/01/2026	Compensation for services rendered to Issuer

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Sean Saint c/o Beta Bionics, Inc. 11 Hughes Irvine CA 92618	Common Stock	12/02/2025	3278	96163.08

144: Remarks and Signature

Remarks	This is a sell-to-cover transaction for taxes owed related to recent vesting of stock unit awards granted by the Issuer.
Date of Notice	03/04/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Stephen Feider, Attorney-in-Fact
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)